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    <h1>
        <i class="fa fa-circle-o-notch fa-spin"></i>
        <a href="../.." >Location对象，URL对象，URLSearchParams 对象</a>
    </h1>
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                                <section class="normal markdown-section">
                                
                                <h1 id="location-&#x5BF9;&#x8C61;&#xFF0C;url-&#x5BF9;&#x8C61;&#xFF0C;urlsearchparams-&#x5BF9;&#x8C61;">Location &#x5BF9;&#x8C61;&#xFF0C;URL &#x5BF9;&#x8C61;&#xFF0C;URLSearchParams &#x5BF9;&#x8C61;</h1>
<p>URL &#x662F;&#x4E92;&#x8054;&#x7F51;&#x7684;&#x57FA;&#x7840;&#x8BBE;&#x65BD;&#x4E4B;&#x4E00;&#x3002;&#x6D4F;&#x89C8;&#x5668;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E9B;&#x539F;&#x751F;&#x5BF9;&#x8C61;&#xFF0C;&#x7528;&#x6765;&#x7BA1;&#x7406; URL&#x3002;</p>
<h2 id="location-&#x5BF9;&#x8C61;">Location &#x5BF9;&#x8C61;</h2>
<p><code>Location</code>&#x5BF9;&#x8C61;&#x662F;&#x6D4F;&#x89C8;&#x5668;&#x63D0;&#x4F9B;&#x7684;&#x539F;&#x751F;&#x5BF9;&#x8C61;&#xFF0C;&#x63D0;&#x4F9B; URL &#x76F8;&#x5173;&#x7684;&#x4FE1;&#x606F;&#x548C;&#x64CD;&#x4F5C;&#x65B9;&#x6CD5;&#x3002;&#x901A;&#x8FC7;<code>window.location</code>&#x548C;<code>document.location</code>&#x5C5E;&#x6027;&#xFF0C;&#x53EF;&#x4EE5;&#x62FF;&#x5230;&#x8FD9;&#x4E2A;&#x5BF9;&#x8C61;&#x3002;</p>
<h3 id="&#x5C5E;&#x6027;">&#x5C5E;&#x6027;</h3>
<p><code>Location</code>&#x5BF9;&#x8C61;&#x63D0;&#x4F9B;&#x4EE5;&#x4E0B;&#x5C5E;&#x6027;&#x3002;</p>
<ul>
<li><code>Location.href</code>&#xFF1A;&#x6574;&#x4E2A; URL&#x3002;</li>
<li><code>Location.protocol</code>&#xFF1A;&#x5F53;&#x524D; URL &#x7684;&#x534F;&#x8BAE;&#xFF0C;&#x5305;&#x62EC;&#x5192;&#x53F7;&#xFF08;<code>:</code>&#xFF09;&#x3002;</li>
<li><code>Location.host</code>&#xFF1A;&#x4E3B;&#x673A;&#x3002;&#x5982;&#x679C;&#x7AEF;&#x53E3;&#x4E0D;&#x662F;&#x534F;&#x8BAE;&#x9ED8;&#x8BA4;&#x7684;<code>80</code>&#x548C;<code>433</code>&#xFF0C;&#x5219;&#x8FD8;&#x4F1A;&#x5305;&#x62EC;&#x5192;&#x53F7;&#xFF08;<code>:</code>&#xFF09;&#x548C;&#x7AEF;&#x53E3;&#x3002;</li>
<li><code>Location.hostname</code>&#xFF1A;&#x4E3B;&#x673A;&#x540D;&#xFF0C;&#x4E0D;&#x5305;&#x62EC;&#x7AEF;&#x53E3;&#x3002;</li>
<li><code>Location.port</code>&#xFF1A;&#x7AEF;&#x53E3;&#x53F7;&#x3002;</li>
<li><code>Location.pathname</code>&#xFF1A;URL &#x7684;&#x8DEF;&#x5F84;&#x90E8;&#x5206;&#xFF0C;&#x4ECE;&#x6839;&#x8DEF;&#x5F84;<code>/</code>&#x5F00;&#x59CB;&#x3002;</li>
<li><code>Location.search</code>&#xFF1A;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x90E8;&#x5206;&#xFF0C;&#x4ECE;&#x95EE;&#x53F7;<code>?</code>&#x5F00;&#x59CB;&#x3002;</li>
<li><code>Location.hash</code>&#xFF1A;&#x7247;&#x6BB5;&#x5B57;&#x7B26;&#x4E32;&#x90E8;&#x5206;&#xFF0C;&#x4ECE;<code>#</code>&#x5F00;&#x59CB;&#x3002;</li>
<li><code>Location.username</code>&#xFF1A;&#x57DF;&#x540D;&#x524D;&#x9762;&#x7684;&#x7528;&#x6237;&#x540D;&#x3002;</li>
<li><code>Location.password</code>&#xFF1A;&#x57DF;&#x540D;&#x524D;&#x9762;&#x7684;&#x5BC6;&#x7801;&#x3002;</li>
<li><code>Location.origin</code>&#xFF1A;URL &#x7684;&#x534F;&#x8BAE;&#x3001;&#x4E3B;&#x673A;&#x540D;&#x548C;&#x7AEF;&#x53E3;&#x3002;</li>
</ul>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x5F53;&#x524D;&#x7F51;&#x5740;&#x4E3A;</span>
<span class="hljs-comment">// http://user:passwd@www.example.com:4097/path/a.html?x=111#part1</span>
<span class="hljs-built_in">document</span>.location.href
<span class="hljs-comment">// &quot;http://user:passwd@www.example.com:4097/path/a.html?x=111#part1&quot;</span>
<span class="hljs-built_in">document</span>.location.protocol
<span class="hljs-comment">// &quot;http:&quot;</span>
<span class="hljs-built_in">document</span>.location.host
<span class="hljs-comment">// &quot;www.example.com:4097&quot;</span>
<span class="hljs-built_in">document</span>.location.hostname
<span class="hljs-comment">// &quot;www.example.com&quot;</span>
<span class="hljs-built_in">document</span>.location.port
<span class="hljs-comment">// &quot;4097&quot;</span>
<span class="hljs-built_in">document</span>.location.pathname
<span class="hljs-comment">// &quot;/path/a.html&quot;</span>
<span class="hljs-built_in">document</span>.location.search
<span class="hljs-comment">// &quot;?x=111&quot;</span>
<span class="hljs-built_in">document</span>.location.hash
<span class="hljs-comment">// &quot;#part1&quot;</span>
<span class="hljs-built_in">document</span>.location.username
<span class="hljs-comment">// &quot;user&quot;</span>
<span class="hljs-built_in">document</span>.location.password
<span class="hljs-comment">// &quot;passwd&quot;</span>
<span class="hljs-built_in">document</span>.location.origin
<span class="hljs-comment">// &quot;http://user:passwd@www.example.com:4097&quot;</span>
</code></pre>
<p>&#x8FD9;&#x4E9B;&#x5C5E;&#x6027;&#x91CC;&#x9762;&#xFF0C;&#x53EA;&#x6709;<code>origin</code>&#x5C5E;&#x6027;&#x662F;&#x53EA;&#x8BFB;&#x7684;&#xFF0C;&#x5176;&#x4ED6;&#x5C5E;&#x6027;&#x90FD;&#x53EF;&#x5199;&#x3002;</p>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x5982;&#x679C;&#x5BF9;<code>Location.href</code>&#x5199;&#x5165;&#x65B0;&#x7684; URL &#x5730;&#x5740;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x4F1A;&#x7ACB;&#x523B;&#x8DF3;&#x8F6C;&#x5230;&#x8FD9;&#x4E2A;&#x65B0;&#x5730;&#x5740;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x8DF3;&#x8F6C;&#x5230;&#x65B0;&#x7F51;&#x5740;</span>
<span class="hljs-built_in">document</span>.location.href = <span class="hljs-string">&apos;http://www.example.com&apos;</span>;
</code></pre>
<p>&#x8FD9;&#x4E2A;&#x7279;&#x6027;&#x5E38;&#x5E38;&#x7528;&#x4E8E;&#x8BA9;&#x7F51;&#x9875;&#x81EA;&#x52A8;&#x6EDA;&#x52A8;&#x5230;&#x65B0;&#x7684;&#x951A;&#x70B9;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.location.href = <span class="hljs-string">&apos;#top&apos;</span>;
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-built_in">document</span>.location.hash = <span class="hljs-string">&apos;#top&apos;</span>;
</code></pre>
<p>&#x76F4;&#x63A5;&#x6539;&#x5199;<code>location</code>&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;&#x5199;&#x5165;<code>href</code>&#x5C5E;&#x6027;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">document</span>.location = <span class="hljs-string">&apos;http://www.example.com&apos;</span>;
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-built_in">document</span>.location.href = <span class="hljs-string">&apos;http://www.example.com&apos;</span>;
</code></pre>
<p>&#x53E6;&#x5916;&#xFF0C;<code>Location.href</code>&#x5C5E;&#x6027;&#x662F;&#x6D4F;&#x89C8;&#x5668;&#x552F;&#x4E00;&#x5141;&#x8BB8;&#x8DE8;&#x57DF;&#x5199;&#x5165;&#x7684;&#x5C5E;&#x6027;&#xFF0C;&#x5373;&#x975E;&#x540C;&#x6E90;&#x7684;&#x7A97;&#x53E3;&#x53EF;&#x4EE5;&#x6539;&#x5199;&#x53E6;&#x4E00;&#x4E2A;&#x7A97;&#x53E3;&#xFF08;&#x6BD4;&#x5982;&#x5B50;&#x7A97;&#x53E3;&#x4E0E;&#x7236;&#x7A97;&#x53E3;&#xFF09;&#x7684;<code>Location.href</code>&#x5C5E;&#x6027;&#xFF0C;&#x5BFC;&#x81F4;&#x540E;&#x8005;&#x7684;&#x7F51;&#x5740;&#x8DF3;&#x8F6C;&#x3002;<code>Location</code>&#x7684;&#x5176;&#x4ED6;&#x5C5E;&#x6027;&#x90FD;&#x4E0D;&#x5141;&#x8BB8;&#x8DE8;&#x57DF;&#x5199;&#x5165;&#x3002;</p>
<h3 id="&#x65B9;&#x6CD5;">&#x65B9;&#x6CD5;</h3>
<p><strong>&#xFF08;1&#xFF09;Location.assign()</strong></p>
<p><code>assign</code>&#x65B9;&#x6CD5;&#x63A5;&#x53D7;&#x4E00;&#x4E2A; URL &#x5B57;&#x7B26;&#x4E32;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#xFF0C;&#x4F7F;&#x5F97;&#x6D4F;&#x89C8;&#x5668;&#x7ACB;&#x523B;&#x8DF3;&#x8F6C;&#x5230;&#x65B0;&#x7684; URL&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x4E0D;&#x662F;&#x6709;&#x6548;&#x7684; URL &#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5219;&#x4F1A;&#x62A5;&#x9519;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x8DF3;&#x8F6C;&#x5230;&#x65B0;&#x7684;&#x7F51;&#x5740;</span>
<span class="hljs-built_in">document</span>.location.assign(<span class="hljs-string">&apos;http://www.example.com&apos;</span>)
</code></pre>
<p><strong>&#xFF08;2&#xFF09;Location.replace()</strong></p>
<p><code>replace</code>&#x65B9;&#x6CD5;&#x63A5;&#x53D7;&#x4E00;&#x4E2A; URL &#x5B57;&#x7B26;&#x4E32;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#xFF0C;&#x4F7F;&#x5F97;&#x6D4F;&#x89C8;&#x5668;&#x7ACB;&#x523B;&#x8DF3;&#x8F6C;&#x5230;&#x65B0;&#x7684; URL&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x4E0D;&#x662F;&#x6709;&#x6548;&#x7684; URL &#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5219;&#x4F1A;&#x62A5;&#x9519;&#x3002;</p>
<p>&#x5B83;&#x4E0E;<code>assign</code>&#x65B9;&#x6CD5;&#x7684;&#x5DEE;&#x5F02;&#x5728;&#x4E8E;&#xFF0C;<code>replace</code>&#x4F1A;&#x5728;&#x6D4F;&#x89C8;&#x5668;&#x7684;&#x6D4F;&#x89C8;&#x5386;&#x53F2;<code>History</code>&#x91CC;&#x9762;&#x5220;&#x9664;&#x5F53;&#x524D;&#x7F51;&#x5740;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x4E00;&#x65E6;&#x4F7F;&#x7528;&#x4E86;&#x8BE5;&#x65B9;&#x6CD5;&#xFF0C;&#x540E;&#x9000;&#x6309;&#x94AE;&#x5C31;&#x65E0;&#x6CD5;&#x56DE;&#x5230;&#x5F53;&#x524D;&#x7F51;&#x9875;&#x4E86;&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;&#x5728;&#x6D4F;&#x89C8;&#x5386;&#x53F2;&#x91CC;&#x9762;&#xFF0C;&#x4F7F;&#x7528;&#x65B0;&#x7684; URL &#x66FF;&#x6362;&#x4E86;&#x8001;&#x7684; URL&#x3002;&#x5B83;&#x7684;&#x4E00;&#x4E2A;&#x5E94;&#x7528;&#x662F;&#xFF0C;&#x5F53;&#x811A;&#x672C;&#x53D1;&#x73B0;&#x5F53;&#x524D;&#x662F;&#x79FB;&#x52A8;&#x8BBE;&#x5907;&#x65F6;&#xFF0C;&#x5C31;&#x7ACB;&#x523B;&#x8DF3;&#x8F6C;&#x5230;&#x79FB;&#x52A8;&#x7248;&#x7F51;&#x9875;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x8DF3;&#x8F6C;&#x5230;&#x65B0;&#x7684;&#x7F51;&#x5740;</span>
<span class="hljs-built_in">document</span>.location.replace(<span class="hljs-string">&apos;http://www.example.com&apos;</span>)
</code></pre>
<p><strong>&#xFF08;3&#xFF09;Location.reload()</strong></p>
<p><code>reload</code>&#x65B9;&#x6CD5;&#x4F7F;&#x5F97;&#x6D4F;&#x89C8;&#x5668;&#x91CD;&#x65B0;&#x52A0;&#x8F7D;&#x5F53;&#x524D;&#x7F51;&#x5740;&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;&#x6309;&#x4E0B;&#x6D4F;&#x89C8;&#x5668;&#x7684;&#x5237;&#x65B0;&#x6309;&#x94AE;&#x3002;</p>
<p>&#x5B83;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x5E03;&#x5C14;&#x503C;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x4E3A;<code>true</code>&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C06;&#x5411;&#x670D;&#x52A1;&#x5668;&#x91CD;&#x65B0;&#x8BF7;&#x6C42;&#x8FD9;&#x4E2A;&#x7F51;&#x9875;&#xFF0C;&#x5E76;&#x4E14;&#x91CD;&#x65B0;&#x52A0;&#x8F7D;&#x540E;&#xFF0C;&#x7F51;&#x9875;&#x5C06;&#x6EDA;&#x52A8;&#x5230;&#x5934;&#x90E8;&#xFF08;&#x5373;<code>scrollTop === 0</code>&#xFF09;&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x662F;<code>false</code>&#x6216;&#x4E3A;&#x7A7A;&#xFF0C;&#x6D4F;&#x89C8;&#x5668;&#x5C06;&#x4ECE;&#x672C;&#x5730;&#x7F13;&#x5B58;&#x91CD;&#x65B0;&#x52A0;&#x8F7D;&#x8BE5;&#x7F51;&#x9875;&#xFF0C;&#x5E76;&#x4E14;&#x91CD;&#x65B0;&#x52A0;&#x8F7D;&#x540E;&#xFF0C;&#x7F51;&#x9875;&#x7684;&#x89C6;&#x53E3;&#x4F4D;&#x7F6E;&#x662F;&#x91CD;&#x65B0;&#x52A0;&#x8F7D;&#x524D;&#x7684;&#x4F4D;&#x7F6E;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x5411;&#x670D;&#x52A1;&#x5668;&#x91CD;&#x65B0;&#x8BF7;&#x6C42;&#x5F53;&#x524D;&#x7F51;&#x5740;</span>
<span class="hljs-built_in">window</span>.location.reload(<span class="hljs-literal">true</span>);
</code></pre>
<p><strong>&#xFF08;4&#xFF09;Location.toString()</strong></p>
<p><code>toString</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x6574;&#x4E2A; URL &#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x76F8;&#x5F53;&#x4E8E;&#x8BFB;&#x53D6;<code>Location.href</code>&#x5C5E;&#x6027;&#x3002;</p>
<h2 id="url-&#x7684;&#x7F16;&#x7801;&#x548C;&#x89E3;&#x7801;">URL &#x7684;&#x7F16;&#x7801;&#x548C;&#x89E3;&#x7801;</h2>
<p>&#x7F51;&#x9875;&#x7684; URL &#x53EA;&#x80FD;&#x5305;&#x542B;&#x5408;&#x6CD5;&#x7684;&#x5B57;&#x7B26;&#x3002;&#x5408;&#x6CD5;&#x5B57;&#x7B26;&#x5206;&#x6210;&#x4E24;&#x7C7B;&#x3002;</p>
<ul>
<li>URL &#x5143;&#x5B57;&#x7B26;&#xFF1A;&#x5206;&#x53F7;&#xFF08;<code>;</code>&#xFF09;&#xFF0C;&#x9017;&#x53F7;&#xFF08;<code>,</code>&#xFF09;&#xFF0C;&#x659C;&#x6760;&#xFF08;<code>/</code>&#xFF09;&#xFF0C;&#x95EE;&#x53F7;&#xFF08;<code>?</code>&#xFF09;&#xFF0C;&#x5192;&#x53F7;&#xFF08;<code>:</code>&#xFF09;&#xFF0C;at&#xFF08;<code>@</code>&#xFF09;&#xFF0C;<code>&amp;</code>&#xFF0C;&#x7B49;&#x53F7;&#xFF08;<code>=</code>&#xFF09;&#xFF0C;&#x52A0;&#x53F7;&#xFF08;<code>+</code>&#xFF09;&#xFF0C;&#x7F8E;&#x5143;&#x7B26;&#x53F7;&#xFF08;<code>$</code>&#xFF09;&#xFF0C;&#x4E95;&#x53F7;&#xFF08;<code>#</code>&#xFF09;</li>
<li>&#x8BED;&#x4E49;&#x5B57;&#x7B26;&#xFF1A;<code>a-z</code>&#xFF0C;<code>A-Z</code>&#xFF0C;<code>0-9</code>&#xFF0C;&#x8FDE;&#x8BCD;&#x53F7;&#xFF08;<code>-</code>&#xFF09;&#xFF0C;&#x4E0B;&#x5212;&#x7EBF;&#xFF08;<code>_</code>&#xFF09;&#xFF0C;&#x70B9;&#xFF08;<code>.</code>&#xFF09;&#xFF0C;&#x611F;&#x53F9;&#x53F7;&#xFF08;<code>!</code>&#xFF09;&#xFF0C;&#x6CE2;&#x6D6A;&#x7EBF;&#xFF08;<code>~</code>&#xFF09;&#xFF0C;&#x661F;&#x53F7;&#xFF08;<code>*</code>&#xFF09;&#xFF0C;&#x5355;&#x5F15;&#x53F7;&#xFF08;<code>&apos;</code>&#xFF09;&#xFF0C;&#x5706;&#x62EC;&#x53F7;&#xFF08;<code>()</code>&#xFF09;</li>
</ul>
<p>&#x9664;&#x4E86;&#x4EE5;&#x4E0A;&#x5B57;&#x7B26;&#xFF0C;&#x5176;&#x4ED6;&#x5B57;&#x7B26;&#x51FA;&#x73B0;&#x5728; URL &#x4E4B;&#x4E2D;&#x90FD;&#x5FC5;&#x987B;&#x8F6C;&#x4E49;&#xFF0C;&#x89C4;&#x5219;&#x662F;&#x6839;&#x636E;&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x7684;&#x9ED8;&#x8BA4;&#x7F16;&#x7801;&#xFF0C;&#x5C06;&#x6BCF;&#x4E2A;&#x5B57;&#x8282;&#x8F6C;&#x4E3A;&#x767E;&#x5206;&#x53F7;&#xFF08;<code>%</code>&#xFF09;&#x52A0;&#x4E0A;&#x4E24;&#x4E2A;&#x5927;&#x5199;&#x7684;&#x5341;&#x516D;&#x8FDB;&#x5236;&#x5B57;&#x6BCD;&#x3002;</p>
<p>&#x6BD4;&#x5982;&#xFF0C;UTF-8 &#x7684;&#x64CD;&#x4F5C;&#x7CFB;&#x7EDF;&#x4E0A;&#xFF0C;<code>http://www.example.com/q=&#x6625;&#x8282;</code>&#x8FD9;&#x4E2A; URL &#x4E4B;&#x4E2D;&#xFF0C;&#x6C49;&#x5B57;&#x201C;&#x6625;&#x8282;&#x201D;&#x4E0D;&#x662F; URL &#x7684;&#x5408;&#x6CD5;&#x5B57;&#x7B26;&#xFF0C;&#x6240;&#x4EE5;&#x88AB;&#x6D4F;&#x89C8;&#x5668;&#x81EA;&#x52A8;&#x8F6C;&#x6210;<code>http://www.example.com/q=%E6%98%A5%E8%8A%82</code>&#x3002;&#x5176;&#x4E2D;&#xFF0C;&#x201C;&#x6625;&#x201D;&#x8F6C;&#x6210;&#x4E86;<code>%E6%98%A5</code>&#xFF0C;&#x201C;&#x8282;&#x201D;&#x8F6C;&#x6210;&#x4E86;<code>%E8%8A%82</code>&#x3002;&#x8FD9;&#x662F;&#x56E0;&#x4E3A;&#x201C;&#x6625;&#x201D;&#x548C;&#x201C;&#x8282;&#x201D;&#x7684; UTF-8 &#x7F16;&#x7801;&#x5206;&#x522B;&#x662F;<code>E6 98 A5</code>&#x548C;<code>E8 8A 82</code>&#xFF0C;&#x5C06;&#x6BCF;&#x4E2A;&#x5B57;&#x8282;&#x524D;&#x9762;&#x52A0;&#x4E0A;&#x767E;&#x5206;&#x53F7;&#xFF0C;&#x5C31;&#x6784;&#x6210;&#x4E86; URL &#x7F16;&#x7801;&#x3002;</p>
<p>JavaScript &#x63D0;&#x4F9B;&#x56DB;&#x4E2A; URL &#x7684;&#x7F16;&#x7801;/&#x89E3;&#x7801;&#x65B9;&#x6CD5;&#x3002;</p>
<ul>
<li><code>encodeURI()</code></li>
<li><code>encodeURIComponent()</code></li>
<li><code>decodeURI()</code></li>
<li><code>decodeURIComponent()</code></li>
</ul>
<h3 id="encodeuri">encodeURI()</h3>
<p><code>encodeURI()</code>&#x65B9;&#x6CD5;&#x7528;&#x4E8E;&#x8F6C;&#x7801;&#x6574;&#x4E2A; URL&#x3002;&#x5B83;&#x7684;&#x53C2;&#x6570;&#x662F;&#x4E00;&#x4E2A;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x4EE3;&#x8868;&#x6574;&#x4E2A; URL&#x3002;&#x5B83;&#x4F1A;&#x5C06;&#x5143;&#x5B57;&#x7B26;&#x548C;&#x8BED;&#x4E49;&#x5B57;&#x7B26;&#x4E4B;&#x5916;&#x7684;&#x5B57;&#x7B26;&#xFF0C;&#x90FD;&#x8FDB;&#x884C;&#x8F6C;&#x4E49;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">encodeURI</span>(<span class="hljs-string">&apos;http://www.example.com/q=&#x6625;&#x8282;&apos;</span>)
<span class="hljs-comment">// &quot;http://www.example.com/q=%E6%98%A5%E8%8A%82&quot;</span>
</code></pre>
<h3 id="encodeuricomponent">encodeURIComponent()</h3>
<p><code>encodeURIComponent()</code>&#x65B9;&#x6CD5;&#x7528;&#x4E8E;&#x8F6C;&#x7801; URL &#x7684;&#x7EC4;&#x6210;&#x90E8;&#x5206;&#xFF0C;&#x4F1A;&#x8F6C;&#x7801;&#x9664;&#x4E86;&#x8BED;&#x4E49;&#x5B57;&#x7B26;&#x4E4B;&#x5916;&#x7684;&#x6240;&#x6709;&#x5B57;&#x7B26;&#xFF0C;&#x5373;&#x5143;&#x5B57;&#x7B26;&#x4E5F;&#x4F1A;&#x88AB;&#x8F6C;&#x7801;&#x3002;&#x6240;&#x4EE5;&#xFF0C;&#x5B83;&#x4E0D;&#x80FD;&#x7528;&#x4E8E;&#x8F6C;&#x7801;&#x6574;&#x4E2A; URL&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x5C31;&#x662F; URL &#x7684;&#x7247;&#x6BB5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">encodeURIComponent</span>(<span class="hljs-string">&apos;&#x6625;&#x8282;&apos;</span>)
<span class="hljs-comment">// &quot;%E6%98%A5%E8%8A%82&quot;</span>
<span class="hljs-built_in">encodeURIComponent</span>(<span class="hljs-string">&apos;http://www.example.com/q=&#x6625;&#x8282;&apos;</span>)
<span class="hljs-comment">// &quot;http%3A%2F%2Fwww.example.com%2Fq%3D%E6%98%A5%E8%8A%82&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>encodeURIComponent()</code>&#x4F1A;&#x8FDE; URL &#x5143;&#x5B57;&#x7B26;&#x4E00;&#x8D77;&#x8F6C;&#x4E49;&#xFF0C;&#x6240;&#x4EE5;&#x5982;&#x679C;&#x8F6C;&#x7801;&#x6574;&#x4E2A; URL &#x5C31;&#x4F1A;&#x51FA;&#x9519;&#x3002;</p>
<h3 id="decodeuri">decodeURI()</h3>
<p><code>decodeURI()</code>&#x65B9;&#x6CD5;&#x7528;&#x4E8E;&#x6574;&#x4E2A; URL &#x7684;&#x89E3;&#x7801;&#x3002;&#x5B83;&#x662F;<code>encodeURI()</code>&#x65B9;&#x6CD5;&#x7684;&#x9006;&#x8FD0;&#x7B97;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x5C31;&#x662F;&#x8F6C;&#x7801;&#x540E;&#x7684; URL&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">decodeURI</span>(<span class="hljs-string">&apos;http://www.example.com/q=%E6%98%A5%E8%8A%82&apos;</span>)
<span class="hljs-comment">// &quot;http://www.example.com/q=&#x6625;&#x8282;&quot;</span>
</code></pre>
<h3 id="decodeuricomponent">decodeURIComponent()</h3>
<p><code>decodeURIComponent()</code>&#x7528;&#x4E8E;URL &#x7247;&#x6BB5;&#x7684;&#x89E3;&#x7801;&#x3002;&#x5B83;&#x662F;<code>encodeURIComponent()</code>&#x65B9;&#x6CD5;&#x7684;&#x9006;&#x8FD0;&#x7B97;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x5C31;&#x662F;&#x8F6C;&#x7801;&#x540E;&#x7684; URL &#x7247;&#x6BB5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-built_in">decodeURIComponent</span>(<span class="hljs-string">&apos;%E6%98%A5%E8%8A%82&apos;</span>)
<span class="hljs-comment">// &quot;&#x6625;&#x8282;&quot;</span>
</code></pre>
<h2 id="url-&#x5BF9;&#x8C61;">URL &#x5BF9;&#x8C61;</h2>
<p><code>URL</code>&#x5BF9;&#x8C61;&#x662F;&#x6D4F;&#x89C8;&#x5668;&#x7684;&#x539F;&#x751F;&#x5BF9;&#x8C61;&#xFF0C;&#x53EF;&#x4EE5;&#x7528;&#x6765;&#x6784;&#x9020;&#x3001;&#x89E3;&#x6790;&#x548C;&#x7F16;&#x7801; URL&#x3002;&#x4E00;&#x822C;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x901A;&#x8FC7;<code>window.URL</code>&#x53EF;&#x4EE5;&#x62FF;&#x5230;&#x8FD9;&#x4E2A;&#x5BF9;&#x8C61;&#x3002;</p>
<p><code>&lt;a&gt;</code>&#x5143;&#x7D20;&#x548C;<code>&lt;area&gt;</code>&#x5143;&#x7D20;&#x90FD;&#x90E8;&#x7F72;&#x4E86;&#x8FD9;&#x4E2A;&#x63A5;&#x53E3;&#x3002;&#x8FD9;&#x5C31;&#x662F;&#x8BF4;&#xFF0C;&#x5B83;&#x4EEC;&#x7684; DOM &#x8282;&#x70B9;&#x5BF9;&#x8C61;&#x53EF;&#x4EE5;&#x4F7F;&#x7528; URL &#x7684;&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;&#x548C;&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> a = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">&apos;a&apos;</span>);
a.href = <span class="hljs-string">&apos;http://example.com/?foo=1&apos;</span>;

a.hostname <span class="hljs-comment">// &quot;example.com&quot;</span>
a.search <span class="hljs-comment">// &quot;?foo=1&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>a</code>&#x662F;<code>&lt;a&gt;</code>&#x5143;&#x7D20;&#x7684; DOM &#x8282;&#x70B9;&#x5BF9;&#x8C61;&#x3002;&#x53EF;&#x4EE5;&#x5728;&#x8FD9;&#x4E2A;&#x5BF9;&#x8C61;&#x4E0A;&#x4F7F;&#x7528; URL &#x7684;&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;&#xFF0C;&#x6BD4;&#x5982;<code>hostname</code>&#x548C;<code>search</code>&#x3002;</p>
<h3 id="&#x6784;&#x9020;&#x51FD;&#x6570;">&#x6784;&#x9020;&#x51FD;&#x6570;</h3>
<p><code>URL</code>&#x5BF9;&#x8C61;&#x672C;&#x8EAB;&#x662F;&#x4E00;&#x4E2A;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x751F;&#x6210; URL &#x5B9E;&#x4F8B;&#x3002;</p>
<p>&#x5B83;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;&#x8868;&#x793A; URL &#x7684;&#x5B57;&#x7B26;&#x4E32;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#x3002;&#x5982;&#x679C;&#x53C2;&#x6570;&#x4E0D;&#x662F;&#x5408;&#x6CD5;&#x7684; URL&#xFF0C;&#x4F1A;&#x62A5;&#x9519;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;http://www.example.com/index.html&apos;</span>);
url.href
<span class="hljs-comment">// &quot;http://www.example.com/index.html&quot;</span>
</code></pre>
<p>&#x5982;&#x679C;&#x53C2;&#x6570;&#x662F;&#x53E6;&#x4E00;&#x4E2A; URL &#x5B9E;&#x4F8B;&#xFF0C;&#x6784;&#x9020;&#x51FD;&#x6570;&#x4F1A;&#x81EA;&#x52A8;&#x8BFB;&#x53D6;&#x8BE5;&#x5B9E;&#x4F8B;&#x7684;<code>href</code>&#x5C5E;&#x6027;&#xFF0C;&#x4F5C;&#x4E3A;&#x5B9E;&#x9645;&#x53C2;&#x6570;&#x3002;</p>
<p>&#x5982;&#x679C; URL &#x5B57;&#x7B26;&#x4E32;&#x662F;&#x4E00;&#x4E2A;&#x76F8;&#x5BF9;&#x8DEF;&#x5F84;&#xFF0C;&#x90A3;&#x4E48;&#x9700;&#x8981;&#x8868;&#x793A;&#x7EDD;&#x5BF9;&#x8DEF;&#x5F84;&#x7684;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x4F5C;&#x4E3A;&#x8BA1;&#x7B97;&#x57FA;&#x51C6;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url1 = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;index.html&apos;</span>, <span class="hljs-string">&apos;http://example.com&apos;</span>);
url1.href
<span class="hljs-comment">// &quot;http://example.com/index.html&quot;</span>

<span class="hljs-keyword">var</span> url2 = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;page2.html&apos;</span>, <span class="hljs-string">&apos;http://example.com/page1.html&apos;</span>);
url2.href
<span class="hljs-comment">// &quot;http://example.com/page2.html&quot;</span>

<span class="hljs-keyword">var</span> url3 = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;..&apos;</span>, <span class="hljs-string">&apos;http://example.com/a/b.html&apos;</span>)
url3.href
<span class="hljs-comment">// &quot;http://example.com/&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x8FD4;&#x56DE;&#x7684; URL &#x5B9E;&#x4F8B;&#x7684;&#x8DEF;&#x5F84;&#x90FD;&#x662F;&#x5728;&#x7B2C;&#x4E8C;&#x4E2A;&#x53C2;&#x6570;&#x7684;&#x57FA;&#x7840;&#x4E0A;&#xFF0C;&#x5207;&#x6362;&#x5230;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x5F97;&#x5230;&#x7684;&#x3002;&#x6700;&#x540E;&#x4E00;&#x4E2A;&#x4F8B;&#x5B50;&#x91CC;&#x9762;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x53C2;&#x6570;&#x662F;<code>..</code>&#xFF0C;&#x8868;&#x793A;&#x4E0A;&#x5C42;&#x8DEF;&#x5F84;&#x3002;</p>
<h3 id="&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;">&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;</h3>
<p>URL &#x5B9E;&#x4F8B;&#x7684;&#x5C5E;&#x6027;&#x4E0E;<code>Location</code>&#x5BF9;&#x8C61;&#x7684;&#x5C5E;&#x6027;&#x57FA;&#x672C;&#x4E00;&#x81F4;&#xFF0C;&#x8FD4;&#x56DE;&#x5F53;&#x524D; URL &#x7684;&#x4FE1;&#x606F;&#x3002;</p>
<ul>
<li>URL.href&#xFF1A;&#x8FD4;&#x56DE;&#x6574;&#x4E2A; URL</li>
<li>URL.protocol&#xFF1A;&#x8FD4;&#x56DE;&#x534F;&#x8BAE;&#xFF0C;&#x4EE5;&#x5192;&#x53F7;<code>:</code>&#x7ED3;&#x5C3E;</li>
<li>URL.hostname&#xFF1A;&#x8FD4;&#x56DE;&#x57DF;&#x540D;</li>
<li>URL.host&#xFF1A;&#x8FD4;&#x56DE;&#x57DF;&#x540D;&#x4E0E;&#x7AEF;&#x53E3;&#xFF0C;&#x5305;&#x542B;<code>:</code>&#x53F7;&#xFF0C;&#x9ED8;&#x8BA4;&#x7684;80&#x548C;443&#x7AEF;&#x53E3;&#x4F1A;&#x7701;&#x7565;</li>
<li>URL.port&#xFF1A;&#x8FD4;&#x56DE;&#x7AEF;&#x53E3;</li>
<li>URL.origin&#xFF1A;&#x8FD4;&#x56DE;&#x534F;&#x8BAE;&#x3001;&#x57DF;&#x540D;&#x548C;&#x7AEF;&#x53E3;</li>
<li>URL.pathname&#xFF1A;&#x8FD4;&#x56DE;&#x8DEF;&#x5F84;&#xFF0C;&#x4EE5;&#x659C;&#x6760;<code>/</code>&#x5F00;&#x5934;</li>
<li>URL.search&#xFF1A;&#x8FD4;&#x56DE;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x4EE5;&#x95EE;&#x53F7;<code>?</code>&#x5F00;&#x5934;</li>
<li>URL.searchParams&#xFF1A;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;<code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#xFF0C;&#x8BE5;&#x5C5E;&#x6027;&#x662F;<code>Location</code>&#x5BF9;&#x8C61;&#x6CA1;&#x6709;&#x7684;</li>
<li>URL.hash&#xFF1A;&#x8FD4;&#x56DE;&#x7247;&#x6BB5;&#x8BC6;&#x522B;&#x7B26;&#xFF0C;&#x4EE5;&#x4E95;&#x53F7;<code>#</code>&#x5F00;&#x5934;</li>
<li>URL.password&#xFF1A;&#x8FD4;&#x56DE;&#x57DF;&#x540D;&#x524D;&#x9762;&#x7684;&#x5BC6;&#x7801;</li>
<li>URL.username&#xFF1A;&#x8FD4;&#x56DE;&#x57DF;&#x540D;&#x524D;&#x9762;&#x7684;&#x7528;&#x6237;&#x540D;</li>
</ul>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;http://user:passwd@www.example.com:4097/path/a.html?x=111#part1&apos;</span>);

url.href
<span class="hljs-comment">// &quot;http://user:passwd@www.example.com:4097/path/a.html?x=111#part1&quot;</span>
url.protocol
<span class="hljs-comment">// &quot;http:&quot;</span>
url.hostname
<span class="hljs-comment">// &quot;www.example.com&quot;</span>
url.host
<span class="hljs-comment">// &quot;www.example.com:4097&quot;</span>
url.port
<span class="hljs-comment">// &quot;4097&quot;</span>
url.origin
<span class="hljs-comment">// &quot;http://www.example.com:4097&quot;</span>
url.pathname
<span class="hljs-comment">// &quot;/path/a.html&quot;</span>
url.search
<span class="hljs-comment">// &quot;?x=111&quot;</span>
url.searchParams
<span class="hljs-comment">// URLSearchParams {}</span>
url.hash
<span class="hljs-comment">// &quot;#part1&quot;</span>
url.password
<span class="hljs-comment">// &quot;passwd&quot;</span>
url.username
<span class="hljs-comment">// &quot;user&quot;</span>
</code></pre>
<p>&#x8FD9;&#x4E9B;&#x5C5E;&#x6027;&#x91CC;&#x9762;&#xFF0C;&#x53EA;&#x6709;<code>origin</code>&#x5C5E;&#x6027;&#x662F;&#x53EA;&#x8BFB;&#x7684;&#xFF0C;&#x5176;&#x4ED6;&#x5C5E;&#x6027;&#x90FD;&#x53EF;&#x5199;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;http://example.com/index.html#part1&apos;</span>);

url.pathname = <span class="hljs-string">&apos;index2.html&apos;</span>;
url.href <span class="hljs-comment">// &quot;http://example.com/index2.html#part1&quot;</span>

url.hash = <span class="hljs-string">&apos;#part2&apos;</span>;
url.href <span class="hljs-comment">// &quot;http://example.com/index2.html#part2&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x6539;&#x53D8; URL &#x5B9E;&#x4F8B;&#x7684;<code>pathname</code>&#x5C5E;&#x6027;&#x548C;<code>hash</code>&#x5C5E;&#x6027;&#xFF0C;&#x90FD;&#x4F1A;&#x5B9E;&#x65F6;&#x53CD;&#x6620;&#x5728; URL &#x5B9E;&#x4F8B;&#x5F53;&#x4E2D;&#x3002;</p>
<h3 id="&#x9759;&#x6001;&#x65B9;&#x6CD5;">&#x9759;&#x6001;&#x65B9;&#x6CD5;</h3>
<p><strong>&#xFF08;1&#xFF09;URL.createObjectURL()</strong></p>
<p><code>URL.createObjectURL</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x4E3A;&#x4E0A;&#x4F20;/&#x4E0B;&#x8F7D;&#x7684;&#x6587;&#x4EF6;&#x3001;&#x6D41;&#x5A92;&#x4F53;&#x6587;&#x4EF6;&#x751F;&#x6210;&#x4E00;&#x4E2A; URL &#x5B57;&#x7B26;&#x4E32;&#x3002;&#x8FD9;&#x4E2A;&#x5B57;&#x7B26;&#x4E32;&#x4EE3;&#x8868;&#x4E86;<code>File</code>&#x5BF9;&#x8C61;&#x6216;<code>Blob</code>&#x5BF9;&#x8C61;&#x7684; URL&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// HTML &#x4EE3;&#x7801;&#x5982;&#x4E0B;</span>
<span class="hljs-comment">// &lt;div id=&quot;display&quot;/&gt;</span>
<span class="hljs-comment">// &lt;input</span>
<span class="hljs-comment">//   type=&quot;file&quot;</span>
<span class="hljs-comment">//   id=&quot;fileElem&quot;</span>
<span class="hljs-comment">//   multiple</span>
<span class="hljs-comment">//   accept=&quot;image/*&quot;</span>
<span class="hljs-comment">//   onchange=&quot;handleFiles(this.files)&quot;</span>
<span class="hljs-comment">//  &gt;</span>
<span class="hljs-keyword">var</span> div = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&apos;display&apos;</span>);

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">handleFiles</span>(<span class="hljs-params">files</span>) </span>{
  <span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>; i &lt; files.length; i++) {
    <span class="hljs-keyword">var</span> img = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">&apos;img&apos;</span>);
    img.src = <span class="hljs-built_in">window</span>.URL.createObjectURL(files[i]);
    div.appendChild(img);
  }
}
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>URL.createObjectURL</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x4E3A;&#x4E0A;&#x4F20;&#x7684;&#x6587;&#x4EF6;&#x751F;&#x6210;&#x4E00;&#x4E2A; URL &#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x4F5C;&#x4E3A;<code>&lt;img&gt;</code>&#x5143;&#x7D20;&#x7684;&#x56FE;&#x7247;&#x6765;&#x6E90;&#x3002;</p>
<p>&#x8BE5;&#x65B9;&#x6CD5;&#x751F;&#x6210;&#x7684; URL &#x5C31;&#x50CF;&#x4E0B;&#x9762;&#x7684;&#x6837;&#x5B50;&#x3002;</p>
<pre><code class="lang-javascript">blob:http:<span class="hljs-comment">//localhost/c745ef73-ece9-46da-8f66-ebes574789b1</span>
</code></pre>
<p>&#x6CE8;&#x610F;&#xFF0C;&#x6BCF;&#x6B21;&#x4F7F;&#x7528;<code>URL.createObjectURL</code>&#x65B9;&#x6CD5;&#xFF0C;&#x90FD;&#x4F1A;&#x5728;&#x5185;&#x5B58;&#x91CC;&#x9762;&#x751F;&#x6210;&#x4E00;&#x4E2A; URL &#x5B9E;&#x4F8B;&#x3002;&#x5982;&#x679C;&#x4E0D;&#x518D;&#x9700;&#x8981;&#x8BE5;&#x65B9;&#x6CD5;&#x751F;&#x6210;&#x7684; URL &#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x4E3A;&#x4E86;&#x8282;&#x7701;&#x5185;&#x5B58;&#xFF0C;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;<code>URL.revokeObjectURL()</code>&#x65B9;&#x6CD5;&#x91CA;&#x653E;&#x8FD9;&#x4E2A;&#x5B9E;&#x4F8B;&#x3002;</p>
<p><strong>&#xFF08;2&#xFF09;URL.revokeObjectURL()</strong></p>
<p><code>URL.revokeObjectURL</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x91CA;&#x653E;<code>URL.createObjectURL</code>&#x65B9;&#x6CD5;&#x751F;&#x6210;&#x7684; URL &#x5B9E;&#x4F8B;&#x3002;&#x5B83;&#x7684;&#x53C2;&#x6570;&#x5C31;&#x662F;<code>URL.createObjectURL</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x7684; URL &#x5B57;&#x7B26;&#x4E32;&#x3002;</p>
<p>&#x4E0B;&#x9762;&#x4E3A;&#x4E0A;&#x4E00;&#x6BB5;&#x7684;&#x793A;&#x4F8B;&#x52A0;&#x4E0A;<code>URL.revokeObjectURL()</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> div = <span class="hljs-built_in">document</span>.getElementById(<span class="hljs-string">&apos;display&apos;</span>);

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">handleFiles</span>(<span class="hljs-params">files</span>) </span>{
  <span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>; i &lt; files.length; i++) {
    <span class="hljs-keyword">var</span> img = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">&apos;img&apos;</span>);
    img.src = <span class="hljs-built_in">window</span>.URL.createObjectURL(files[i]);
    div.appendChild(img);
    img.onload = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params"></span>) </span>{
      <span class="hljs-built_in">window</span>.URL.revokeObjectURL(<span class="hljs-keyword">this</span>.src);
    }
  }
}
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x4E00;&#x65E6;&#x56FE;&#x7247;&#x52A0;&#x8F7D;&#x6210;&#x529F;&#x4EE5;&#x540E;&#xFF0C;&#x4E3A;&#x672C;&#x5730;&#x6587;&#x4EF6;&#x751F;&#x6210;&#x7684; URL &#x5B57;&#x7B26;&#x4E32;&#x5C31;&#x6CA1;&#x7528;&#x4E86;&#xFF0C;&#x4E8E;&#x662F;&#x53EF;&#x4EE5;&#x5728;<code>img.onload</code>&#x56DE;&#x8C03;&#x51FD;&#x6570;&#x91CC;&#x9762;&#xFF0C;&#x901A;&#x8FC7;<code>URL.revokeObjectURL</code>&#x65B9;&#x6CD5;&#x5378;&#x8F7D;&#x8FD9;&#x4E2A; URL &#x5B9E;&#x4F8B;&#x3002;</p>
<h2 id="urlsearchparams-&#x5BF9;&#x8C61;">URLSearchParams &#x5BF9;&#x8C61;</h2>
<h3 id="&#x6982;&#x8FF0;">&#x6982;&#x8FF0;</h3>
<p><code>URLSearchParams</code>&#x5BF9;&#x8C61;&#x662F;&#x6D4F;&#x89C8;&#x5668;&#x7684;&#x539F;&#x751F;&#x5BF9;&#x8C61;&#xFF0C;&#x7528;&#x6765;&#x6784;&#x9020;&#x3001;&#x89E3;&#x6790;&#x548C;&#x5904;&#x7406; URL &#x7684;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#xFF08;&#x5373; URL &#x95EE;&#x53F7;&#x540E;&#x9762;&#x7684;&#x90E8;&#x5206;&#xFF09;&#x3002;</p>
<p>&#x5B83;&#x672C;&#x8EAB;&#x4E5F;&#x662F;&#x4E00;&#x4E2A;&#x6784;&#x9020;&#x51FD;&#x6570;&#xFF0C;&#x53EF;&#x4EE5;&#x751F;&#x6210;&#x5B9E;&#x4F8B;&#x3002;&#x53C2;&#x6570;&#x53EF;&#x4EE5;&#x4E3A;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x8D77;&#x9996;&#x7684;&#x95EE;&#x53F7;<code>?</code>&#x6709;&#x6CA1;&#x6709;&#x90FD;&#x884C;&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x662F;&#x5BF9;&#x5E94;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x6570;&#x7EC4;&#x6216;&#x5BF9;&#x8C61;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x65B9;&#x6CD5;&#x4E00;&#xFF1A;&#x4F20;&#x5165;&#x5B57;&#x7B26;&#x4E32;</span>
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=1&amp;bar=2&apos;</span>);
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-built_in">document</span>.location.search);

<span class="hljs-comment">// &#x65B9;&#x6CD5;&#x4E8C;&#xFF1A;&#x4F20;&#x5165;&#x6570;&#x7EC4;</span>
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams([[<span class="hljs-string">&apos;foo&apos;</span>, <span class="hljs-number">1</span>], [<span class="hljs-string">&apos;bar&apos;</span>, <span class="hljs-number">2</span>]]);

<span class="hljs-comment">// &#x65B9;&#x6CD5;&#x4E09;&#xFF1A;&#x4F20;&#x5165;&#x5BF9;&#x8C61;</span>
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span> : <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span> : <span class="hljs-number">2</span>});
</code></pre>
<p><code>URLSearchParams</code>&#x4F1A;&#x5BF9;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x81EA;&#x52A8;&#x7F16;&#x7801;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-string">&apos;&#x4F60;&#x597D;&apos;</span>});
params.toString() <span class="hljs-comment">// &quot;foo=%E4%BD%A0%E5%A5%BD&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>foo</code>&#x7684;&#x503C;&#x662F;&#x6C49;&#x5B57;&#xFF0C;<code>URLSearchParams</code>&#x5BF9;&#x5176;&#x81EA;&#x52A8;&#x8FDB;&#x884C; URL &#x7F16;&#x7801;&#x3002;</p>
<p>&#x6D4F;&#x89C8;&#x5668;&#x5411;&#x670D;&#x52A1;&#x5668;&#x53D1;&#x9001;&#x8868;&#x5355;&#x6570;&#x636E;&#x65F6;&#xFF0C;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x4F7F;&#x7528;<code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#x4F5C;&#x4E3A;&#x8868;&#x5355;&#x6570;&#x636E;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> params = <span class="hljs-keyword">new</span> URLSearchParams({foo: <span class="hljs-number">1</span>, bar: <span class="hljs-number">2</span>});
fetch(<span class="hljs-string">&apos;https://example.com/api&apos;</span>, {
  method: <span class="hljs-string">&apos;POST&apos;</span>,
  body: params
}).then(...)
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>fetch</code>&#x547D;&#x4EE4;&#x5411;&#x670D;&#x52A1;&#x5668;&#x53D1;&#x9001;&#x547D;&#x4EE4;&#x65F6;&#xFF0C;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x4F7F;&#x7528;<code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#x3002;</p>
<p><code>URLSearchParams</code>&#x53EF;&#x4EE5;&#x4E0E;<code>URL</code>&#x63A5;&#x53E3;&#x7ED3;&#x5408;&#x4F7F;&#x7528;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url = <span class="hljs-keyword">new</span> URL(<span class="hljs-built_in">window</span>.location);
<span class="hljs-keyword">var</span> foo = url.searchParams.get(<span class="hljs-string">&apos;foo&apos;</span>) || <span class="hljs-string">&apos;somedefault&apos;</span>;
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;URL &#x5B9E;&#x4F8B;&#x7684;<code>searchParams</code>&#x5C5E;&#x6027;&#x5C31;&#x662F;&#x4E00;&#x4E2A;<code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#xFF0C;&#x6240;&#x4EE5;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;<code>URLSearchParams</code>&#x63A5;&#x53E3;&#x7684;<code>get</code>&#x65B9;&#x6CD5;&#x3002;</p>
<p>DOM &#x7684;<code>a</code>&#x5143;&#x7D20;&#x8282;&#x70B9;&#x7684;<code>searchParams</code>&#x5C5E;&#x6027;&#xFF0C;&#x5C31;&#x662F;&#x4E00;&#x4E2A;<code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> a = <span class="hljs-built_in">document</span>.createElement(<span class="hljs-string">&apos;a&apos;</span>);
a.href = <span class="hljs-string">&apos;https://example.com?filter=api&apos;</span>;
a.searchParams.get(<span class="hljs-string">&apos;filter&apos;</span>) <span class="hljs-comment">// &quot;api&quot;</span>
</code></pre>
<p><code>URLSearchParams</code>&#x5B9E;&#x4F8B;&#x6709;&#x904D;&#x5386;&#x5668;&#x63A5;&#x53E3;&#xFF0C;&#x53EF;&#x4EE5;&#x7528;<code>for...of</code>&#x5FAA;&#x73AF;&#x904D;&#x5386;&#xFF08;&#x8BE6;&#x89C1;&#x300A;ES6 &#x6807;&#x51C6;&#x5165;&#x95E8;&#x300B;&#x7684;&#x300A;Iterator&#x300B;&#x4E00;&#x7AE0;&#xFF09;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span>: <span class="hljs-number">2</span>});

<span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params) {
  <span class="hljs-built_in">console</span>.log(p[<span class="hljs-number">0</span>] + <span class="hljs-string">&apos;: &apos;</span> + p[<span class="hljs-number">1</span>]);
}
<span class="hljs-comment">// foo: 1</span>
<span class="hljs-comment">// bar: 2</span>
</code></pre>
<p><code>URLSearchParams</code>&#x6CA1;&#x6709;&#x5B9E;&#x4F8B;&#x5C5E;&#x6027;&#xFF0C;&#x53EA;&#x6709;&#x5B9E;&#x4F8B;&#x65B9;&#x6CD5;&#x3002;</p>
<h3 id="urlsearchparamstostring">URLSearchParams.toString()</h3>
<p><code>toString</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x5B9E;&#x4F8B;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#x5F62;&#x5F0F;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> url = <span class="hljs-keyword">new</span> URL(<span class="hljs-string">&apos;https://example.com?foo=1&amp;bar=2&apos;</span>);
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(url.search);

params.toString() <span class="hljs-comment">// &quot;foo=1&amp;bar=2&apos;</span>
</code></pre>
<p>&#x90A3;&#x4E48;&#x9700;&#x8981;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x573A;&#x5408;&#xFF0C;&#x4F1A;&#x81EA;&#x52A8;&#x8C03;&#x7528;<code>toString</code>&#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({version: <span class="hljs-number">2.0</span>});
<span class="hljs-built_in">window</span>.location.href = location.pathname + <span class="hljs-string">&apos;?&apos;</span> + params;
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>location.href</code>&#x8D4B;&#x503C;&#x65F6;&#xFF0C;&#x53EF;&#x4EE5;&#x76F4;&#x63A5;&#x4F7F;&#x7528;<code>params</code>&#x5BF9;&#x8C61;&#x3002;&#x8FD9;&#x65F6;&#x5C31;&#x4F1A;&#x81EA;&#x52A8;&#x8C03;&#x7528;<code>toString</code>&#x65B9;&#x6CD5;&#x3002;</p>
<h3 id="urlsearchparamsappend">URLSearchParams.append()</h3>
<p><code>append</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x8FFD;&#x52A0;&#x4E00;&#x4E2A;&#x67E5;&#x8BE2;&#x53C2;&#x6570;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x4E24;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x4E3A;&#x952E;&#x540D;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x4E3A;&#x952E;&#x503C;&#xFF0C;&#x6CA1;&#x6709;&#x8FD4;&#x56DE;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span>: <span class="hljs-number">2</span>});
params.append(<span class="hljs-string">&apos;baz&apos;</span>, <span class="hljs-number">3</span>);
params.toString() <span class="hljs-comment">// &quot;foo=1&amp;bar=2&amp;baz=3&quot;</span>
</code></pre>
<p><code>append</code>&#x65B9;&#x6CD5;&#x4E0D;&#x4F1A;&#x8BC6;&#x522B;&#x662F;&#x5426;&#x952E;&#x540D;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span>: <span class="hljs-number">2</span>});
params.append(<span class="hljs-string">&apos;foo&apos;</span>, <span class="hljs-number">3</span>);
params.toString() <span class="hljs-comment">// &quot;foo=1&amp;bar=2&amp;foo=3&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x91CC;&#x9762;<code>foo</code>&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x4E86;&#xFF0C;&#x4F46;&#x662F;<code>append</code>&#x4F9D;&#x7136;&#x4F1A;&#x8FFD;&#x52A0;&#x4E00;&#x4E2A;&#x540C;&#x540D;&#x952E;&#x3002;</p>
<h3 id="urlsearchparamsdelete">URLSearchParams.delete()</h3>
<p><code>delete</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x5220;&#x9664;&#x6307;&#x5B9A;&#x7684;&#x67E5;&#x8BE2;&#x53C2;&#x6570;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x952E;&#x540D;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span>: <span class="hljs-number">2</span>});
params.delete(<span class="hljs-string">&apos;bar&apos;</span>);
params.toString() <span class="hljs-comment">// &quot;foo=1&quot;</span>
</code></pre>
<h3 id="urlsearchparamshas">URLSearchParams.has()</h3>
<p><code>has</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x5E03;&#x5C14;&#x503C;&#xFF0C;&#x8868;&#x793A;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x662F;&#x5426;&#x5305;&#x542B;&#x6307;&#x5B9A;&#x7684;&#x952E;&#x540D;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams({<span class="hljs-string">&apos;foo&apos;</span>: <span class="hljs-number">1</span> , <span class="hljs-string">&apos;bar&apos;</span>: <span class="hljs-number">2</span>});
params.has(<span class="hljs-string">&apos;bar&apos;</span>) <span class="hljs-comment">// true</span>
params.has(<span class="hljs-string">&apos;baz&apos;</span>) <span class="hljs-comment">// false</span>
</code></pre>
<h3 id="urlsearchparamsset">URLSearchParams.set()</h3>
<p><code>set</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x8BBE;&#x7F6E;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x7684;&#x952E;&#x503C;&#x3002;</p>
<p>&#x5B83;&#x63A5;&#x53D7;&#x4E24;&#x4E2A;&#x53C2;&#x6570;&#xFF0C;&#x7B2C;&#x4E00;&#x4E2A;&#x662F;&#x952E;&#x540D;&#xFF0C;&#x7B2C;&#x4E8C;&#x4E2A;&#x662F;&#x952E;&#x503C;&#x3002;&#x5982;&#x679C;&#x662F;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x952E;&#xFF0C;&#x952E;&#x503C;&#x4F1A;&#x88AB;&#x6539;&#x5199;&#xFF0C;&#x5426;&#x5219;&#x4F1A;&#x88AB;&#x8FFD;&#x52A0;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=1&apos;</span>);
params.set(<span class="hljs-string">&apos;foo&apos;</span>, <span class="hljs-number">2</span>);
params.toString() <span class="hljs-comment">// &quot;foo=2&quot;</span>
params.set(<span class="hljs-string">&apos;bar&apos;</span>, <span class="hljs-number">3</span>);
params.toString() <span class="hljs-comment">// &quot;foo=2&amp;bar=3&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;<code>foo</code>&#x662F;&#x5DF2;&#x7ECF;&#x5B58;&#x5728;&#x7684;&#x952E;&#xFF0C;<code>bar</code>&#x662F;&#x8FD8;&#x4E0D;&#x5B58;&#x5728;&#x7684;&#x952E;&#x3002;</p>
<p>&#x5982;&#x679C;&#x6709;&#x591A;&#x4E2A;&#x7684;&#x540C;&#x540D;&#x952E;&#xFF0C;<code>set</code>&#x4F1A;&#x79FB;&#x9664;&#x73B0;&#x5B58;&#x6240;&#x6709;&#x7684;&#x952E;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=1&amp;foo=2&apos;</span>);
params.set(<span class="hljs-string">&apos;foo&apos;</span>, <span class="hljs-number">3</span>);
params.toString() <span class="hljs-comment">// &quot;foo=3&quot;</span>
</code></pre>
<p>&#x4E0B;&#x9762;&#x662F;&#x4E00;&#x4E2A;&#x66FF;&#x6362;&#x5F53;&#x524D; URL &#x7684;&#x4F8B;&#x5B50;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// URL: https://example.com?version=1.0</span>
<span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(location.search.slice(<span class="hljs-number">1</span>));
params.set(<span class="hljs-string">&apos;version&apos;</span>, <span class="hljs-number">2.0</span>);

<span class="hljs-built_in">window</span>.history.replaceState({}, <span class="hljs-string">&apos;&apos;</span>, location.pathname + <span class="hljs-string">`?`</span> + params);
<span class="hljs-comment">// URL: https://example.com?version=2.0</span>
</code></pre>
<h3 id="urlsearchparamsget&#xFF0C;urlsearchparamsgetall">URLSearchParams.get()&#xFF0C;URLSearchParams.getAll()</h3>
<p><code>get</code>&#x65B9;&#x6CD5;&#x7528;&#x6765;&#x8BFB;&#x53D6;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x91CC;&#x9762;&#x7684;&#x6307;&#x5B9A;&#x952E;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x952E;&#x540D;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=1&apos;</span>);
params.get(<span class="hljs-string">&apos;foo&apos;</span>) <span class="hljs-comment">// &quot;1&quot;</span>
params.get(<span class="hljs-string">&apos;bar&apos;</span>) <span class="hljs-comment">// null</span>
</code></pre>
<p>&#x4E24;&#x4E2A;&#x5730;&#x65B9;&#x9700;&#x8981;&#x6CE8;&#x610F;&#x3002;&#x7B2C;&#x4E00;&#xFF0C;&#x5B83;&#x8FD4;&#x56DE;&#x7684;&#x662F;&#x5B57;&#x7B26;&#x4E32;&#xFF0C;&#x5982;&#x679C;&#x539F;&#x59CB;&#x503C;&#x662F;&#x6570;&#x503C;&#xFF0C;&#x9700;&#x8981;&#x8F6C;&#x4E00;&#x4E0B;&#x7C7B;&#x578B;&#xFF1B;&#x7B2C;&#x4E8C;&#xFF0C;&#x5982;&#x679C;&#x6307;&#x5B9A;&#x7684;&#x952E;&#x540D;&#x4E0D;&#x5B58;&#x5728;&#xFF0C;&#x8FD4;&#x56DE;&#x503C;&#x662F;<code>null</code>&#x3002;</p>
<p>&#x5982;&#x679C;&#x6709;&#x591A;&#x4E2A;&#x7684;&#x540C;&#x540D;&#x952E;&#xFF0C;<code>get</code>&#x8FD4;&#x56DE;&#x4F4D;&#x7F6E;&#x6700;&#x524D;&#x9762;&#x7684;&#x90A3;&#x4E2A;&#x952E;&#x503C;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=3&amp;foo=2&amp;foo=1&apos;</span>);
params.get(<span class="hljs-string">&apos;foo&apos;</span>) <span class="hljs-comment">// &quot;3&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x6709;&#x4E09;&#x4E2A;<code>foo</code>&#x952E;&#xFF0C;<code>get</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x6700;&#x524D;&#x9762;&#x7684;&#x952E;&#x503C;<code>3</code>&#x3002;</p>
<p><code>getAll</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x6570;&#x7EC4;&#xFF0C;&#x6210;&#x5458;&#x662F;&#x6307;&#x5B9A;&#x952E;&#x7684;&#x6240;&#x6709;&#x952E;&#x503C;&#x3002;&#x5B83;&#x63A5;&#x53D7;&#x952E;&#x540D;&#x4F5C;&#x4E3A;&#x53C2;&#x6570;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;?foo=1&amp;foo=2&apos;</span>);
params.getAll(<span class="hljs-string">&apos;foo&apos;</span>) <span class="hljs-comment">// [&quot;1&quot;, &quot;2&quot;]</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x6709;&#x4E24;&#x4E2A;<code>foo</code>&#x952E;&#xFF0C;<code>getAll</code>&#x8FD4;&#x56DE;&#x7684;&#x6570;&#x7EC4;&#x5C31;&#x6709;&#x4E24;&#x4E2A;&#x6210;&#x5458;&#x3002;</p>
<h3 id="urlsearchparamssort">URLSearchParams.sort()</h3>
<p><code>sort</code>&#x65B9;&#x6CD5;&#x5BF9;&#x67E5;&#x8BE2;&#x5B57;&#x7B26;&#x4E32;&#x91CC;&#x9762;&#x7684;&#x952E;&#x8FDB;&#x884C;&#x6392;&#x5E8F;&#xFF0C;&#x89C4;&#x5219;&#x662F;&#x6309;&#x7167; Unicode &#x7801;&#x70B9;&#x4ECE;&#x5C0F;&#x5230;&#x5927;&#x6392;&#x5217;&#x3002;</p>
<p>&#x8BE5;&#x65B9;&#x6CD5;&#x6CA1;&#x6709;&#x8FD4;&#x56DE;&#x503C;&#xFF0C;&#x6216;&#x8005;&#x8BF4;&#x8FD4;&#x56DE;&#x503C;&#x662F;<code>undefined</code>&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;c=4&amp;a=2&amp;b=3&amp;a=1&apos;</span>);
params.sort();
params.toString() <span class="hljs-comment">// &quot;a=2&amp;a=1&amp;b=3&amp;c=4&quot;</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4EE3;&#x7801;&#x4E2D;&#xFF0C;&#x5982;&#x679C;&#x6709;&#x4E24;&#x4E2A;&#x540C;&#x540D;&#x7684;&#x952E;<code>a</code>&#xFF0C;&#x5B83;&#x4EEC;&#x4E4B;&#x95F4;&#x4E0D;&#x4F1A;&#x6392;&#x5E8F;&#xFF0C;&#x800C;&#x662F;&#x4FDD;&#x7559;&#x539F;&#x59CB;&#x7684;&#x987A;&#x5E8F;&#x3002;</p>
<h3 id="urlsearchparamskeys&#xFF0C;urlsearchparamsvalues&#xFF0C;urlsearchparamsentries">URLSearchParams.keys()&#xFF0C;URLSearchParams.values()&#xFF0C;URLSearchParams.entries()</h3>
<p>&#x8FD9;&#x4E09;&#x4E2A;&#x65B9;&#x6CD5;&#x90FD;&#x8FD4;&#x56DE;&#x4E00;&#x4E2A;&#x904D;&#x5386;&#x5668;&#x5BF9;&#x8C61;&#xFF0C;&#x4F9B;<code>for...of</code>&#x5FAA;&#x73AF;&#x904D;&#x5386;&#x3002;&#x5B83;&#x4EEC;&#x7684;&#x533A;&#x522B;&#x5728;&#x4E8E;&#xFF0C;<code>keys</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x7684;&#x662F;&#x952E;&#x540D;&#x7684;&#x904D;&#x5386;&#x5668;&#xFF0C;<code>values</code>&#x65B9;&#x6CD5;&#x8FD4;&#x56DE;&#x7684;&#x662F;&#x952E;&#x503C;&#x7684;&#x904D;&#x5386;&#x5668;&#xFF0C;<code>entries</code>&#x8FD4;&#x56DE;&#x7684;&#x662F;&#x952E;&#x503C;&#x5BF9;&#x7684;&#x904D;&#x5386;&#x5668;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> params = <span class="hljs-keyword">new</span> URLSearchParams(<span class="hljs-string">&apos;a=1&amp;b=2&apos;</span>);

<span class="hljs-keyword">for</span>(<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params.keys()) {
  <span class="hljs-built_in">console</span>.log(p);
}
<span class="hljs-comment">// a</span>
<span class="hljs-comment">// b</span>

<span class="hljs-keyword">for</span>(<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params.values()) {
  <span class="hljs-built_in">console</span>.log(p);
}
<span class="hljs-comment">// 1</span>
<span class="hljs-comment">// 2</span>

<span class="hljs-keyword">for</span>(<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params.entries()) {
  <span class="hljs-built_in">console</span>.log(p);
}
<span class="hljs-comment">// [&quot;a&quot;, &quot;1&quot;]</span>
<span class="hljs-comment">// [&quot;b&quot;, &quot;2&quot;]</span>
</code></pre>
<p>&#x5982;&#x679C;&#x76F4;&#x63A5;&#x5BF9;<code>URLSearchParams</code>&#x8FDB;&#x884C;&#x904D;&#x5386;&#xFF0C;&#x5176;&#x5B9E;&#x5185;&#x90E8;&#x8C03;&#x7528;&#x7684;&#x5C31;&#x662F;<code>entries</code>&#x63A5;&#x53E3;&#x3002;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params) {}
<span class="hljs-comment">// &#x7B49;&#x540C;&#x4E8E;</span>
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> p <span class="hljs-keyword">of</span> params.entries()) {}
</code></pre>
<h2 id="&#x53C2;&#x8003;&#x94FE;&#x63A5;">&#x53C2;&#x8003;&#x94FE;&#x63A5;</h2>
<ul>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/Location" target="_blank" rel="nofollow">Location</a>, by MDN</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/URL" target="_blank" rel="nofollow">URL</a>, by MDN</li>
<li><a href="https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams" target="_blank" rel="nofollow">URLSearchParams</a>, by MDN</li>
<li><a href="https://developers.google.com/web/updates/2016/01/urlsearchparams?hl=en" target="_blank" rel="nofollow">Easy URL Manipulation with URLSearchParams</a>, by Eric Bidelman</li>
</ul>




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